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DNS

DNS Articles & Guides

2 articles on DNS — practical guides, tutorials, and technical explainers from TechSystem Lab.

DNSNetworkingTroubleshootingSysAdmin

DNS Troubleshooting with dig: A Workflow for Real Failures

A systematic dig-based workflow for diagnosing DNS problems — isolating resolver vs authoritative faults, reading NXDOMAIN vs SERVFAIL, tracing delegation, catching stale caches, and debugging split-horizon and DNSSEC failures.

August 22, 202610 min read
NetworkingDNSInfrastructure

How DNS Works — Complete Guide to Domain Name System

Learn how DNS works step by step — from typing a URL to loading a website. Covers DNS records, resolution process, caching, DNS security, and troubleshooting. Beginner-friendly guide.

March 17, 202616 min read
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